Removing 腰 and 足D

PMX models have many bones that enhances motion creation workflow.

腰 (back) has cancelling bone to make posing in FK easier. 足D is used to rotate legs when leg IK is active.

While they are useful when making animations in MMD, the PMX rig itself becomes overly complicated. When using Rigify integration, I recommend removing these extra bones.

You can remove 足D/EX and 腰 with 闇鍋プラグイン (EtcPlugin).

Once it’s installed, you should be able to find these entries.

credit: Ellen Joe (Zenless Zone Zero)